This document discusses a mobile application called "My Allergy Calendar" that was created to increase brand awareness of Cetrine, an antihistamine medication. The app provides personalized allergy forecasts and information to users aged 25-35, allowing them to track seasonal allergens. It functions by displaying daily allergen forecasts based on location as well as a calendar view of allergy seasons. Real-time allergy data is collected through air sampling devices and weekly forecasts are received from the Ukrainian Association of Allergology. The goal is to build the Cetrine brand and provide a helpful tool for users to manage their allergies through a mobile platform.